Donald Trump on Monday laid out his vision to destroy radical Islam, calling for new approaches to battle ISIS, the institution of “extreme vetting” of immigrants and ending the use of the US military for costly “nation building.”

“In the 20th century, the United States has defeated fascism, Nazism and communism. Now a different threat challenges our world: radical Islamic terrorism,” Trump said in a speech in Youngstown in the swing state of Ohio that offered his most detailed foreign policy proposals to date.

Trump listed recent Islamist atrocities in Europe, the United States and Middle East and referred to them as “absolute and total genocide” in a address read from a teleprompter.

“We can not let this evil continue. Nor can we let the hateful ideology of radical Islam, its oppression of gays, women, children and non-believers be allowed to reside or spread within our own countries,” he said.

Trump again blamed President Obama and Hillary Clinton for withdrawing from Iraq and creating the conditions for ISIS to thrive — and bashed President George W. Bush for invading the country in the first place.

“What was the purpose of this whole thing? Hundreds and hundreds of young people killed and what happened [to] the people coming back with no arms and no legs? It turns out that all of the reasons for the war were blatantly wrong. All of this death and destruction for nothing,” he said.

The Middle East, he said, was relatively stable before Obama withdrew troops, but has now descended into bloody chaos.

And he also slammed the nuclear deal with Iran, which he said would further destabilize the region.

Trump decried using the military for nation building and said there must be a new approach in which the United States, NATO, Israel and even Russia work together to battle radical Islam, whether it’s ISIS, al Qaeda, Hamas or Hezbollah.

“We will work with anyone who recognizes that ideology of death must be extinguished,” he said, suggesting an arsenal that would include military operations, stopping the flow of cash to terrorists, cyber warfare, stronger intelligence gathering and sanctions.

He said people who want to immigrate to the States should pass an ideological test to ensure they support American values.

“Those who do not believe in our Constitution or who support bigotry and hatred will not be admitted for immigration into our country,” he said, adding that a temporary halt to immigration would be needed until the new program is put in place.